Maschinengenauigkeit

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using System;

namespace ConsoleApplication1
{
	class Program
	{
		private static readonly double epsilon = Epsilon();

		static void Main(string[] args)
		{
			Console.WriteLine(epsilon);
			Console.ReadKey();
		}

		public static double Epsilon()
		{
			double tau = 1.0;
			double walt = 1.0;
			double wneu = 0.0;

			while (wneu != walt)
			{
				tau *= 0.5;
				wneu = walt + tau;
			}

			return 2.0 * tau;
		}
	}
}